package com.ruoyi.framework.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 * redis配置
 *
 * @author ruoyi
 */
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {
  @Bean
  @SuppressWarnings(value = {"unchecked", "rawtypes"})
  public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
    RedisTemplate<Object, Object> template = new RedisTemplate<>();
    template.setConnectionFactory(connectionFactory);

    FastJson2JsonRedisSerializer serializer = new FastJson2JsonRedisSerializer(Object.class);

    ObjectMapper mapper = new ObjectMapper();
    mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    mapper.activateDefaultTyping(
        LaissezFaireSubTypeValidator.instance,
        ObjectMapper.DefaultTyping.NON_FINAL,
        JsonTypeInfo.As.PROPERTY);
    serializer.setObjectMapper(mapper);

    // 使用StringRedisSerializer来序列化和反序列化redis的key值
    template.setKeySerializer(new StringRedisSerializer());
    template.setValueSerializer(serializer);

    // Hash的key也采用StringRedisSerializer的序列化方式
    template.setHashKeySerializer(new StringRedisSerializer());
    template.setHashValueSerializer(serializer);

    template.afterPropertiesSet();
    return template;
  }

  @Bean
  public DefaultRedisScript<Long> limitScript() {
    DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>();
    redisScript.setScriptText(limitScriptText());
    redisScript.setResultType(Long.class);
    return redisScript;
  }

  /** 限流脚本 */
  private String limitScriptText() {
    return "local key = KEYS[1]\n"
        + "local count = tonumber(ARGV[1])\n"
        + "local time = tonumber(ARGV[2])\n"
        + "local current = redis.call('get', key);\n"
        + "if current and tonumber(current) > count then\n"
        + "    return tonumber(current);\n"
        + "end\n"
        + "current = redis.call('incr', key)\n"
        + "if tonumber(current) == 1 then\n"
        + "    redis.call('expire', key, time)\n"
        + "end\n"
        + "return tonumber(current);";
  }
}
